Table 1.

Characteristics of vitreous that was analysed

Vitreous specimen	Number of samples	Patient age (years)	Duration of diabetes (years)
No DM	12	65–75	NA, admitted for non-angiogenic eye disease
DM no DR	4	65–74	17–61
NPDR	9	72–84	10–76
PDR	19	29–83	13–46
QPDR	9	47–67	9–16 (admitted for non-angiogenic eye disease)

As the amount of vitreous obtained from patients varied and was typically insufficient to perform all analyses, vitreous from patients with the same stage of DR was often (but not always, and in such cases noted) pooled prior to analysis

NA, not applicable